Solution - Long multiplication
Step-by-step explanation
1. Rewrite the numbers from top to bottom aligned to the right
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
2. Multiply the numbers using long multiplication method
Because the ten thousands digit of the multiplicator equals 0, skip to the next digit.
Proceed by multiplying the hundred thousands digit (5) of the multiplier (500,000) by each digit of the multiplicand (40,000), from right to left.
Because digit (5) is in hundred thousands place, we shift partial result by 5 place(s) by placing 5 zero(s).
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| 0 | 0 | 0 | 0 | 0 |
Multiply the hundred thousands digit (5) of the multiplicator by the number in the ones place value:
5×0=0
Write 0 in the hundred thousands place.
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| 0 | 0 | 0 | 0 | 0 | 0 |
Multiply the hundred thousands digit (5) of the multiplicator by the number in the tens place value:
5×0=0
Write 0 in the millions place.
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Multiply the hundred thousands digit (5) of the multiplicator by the number in the hundreds place value:
5×0=0
Write 0 in the ten millions place.
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Multiply the hundred thousands digit (5) of the multiplicator by the number in the thousands place value:
5×0=0
Write 0 in the hundred millions place.
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Multiply the hundred thousands digit (5) of the multiplicator by the number in the ten thousands place value:
5×4=20
Write 0 in the billions place.
Because the result is greater than 9, carry the 2 to the ten billions place.
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 2 | |||||||||||
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
20,000,000,000 is the first partial product.
3. Add the partial products
20000000000=20000000000 long addition steps can be seen here
| Place value | ten billions | billions | hundred millions | ten millions | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 4 | 0 | 0 | 0 | 0 | |||||||
| × | 5 | 0 | 0 | 0 | 0 | 0 | |||||
| + | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The solution is: 20,000,000,000
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