Solution - Long multiplication

Start by multiplying the ones digit (6) of the multiplier 6 by each digit of the multiplicand 641, from right to left.

Multiply the ones digit (6) of the multiplicator by the number in the ones place value:
6×1=6

Write 6 in the ones place.

Multiply the ones digit (6) of the multiplicator by the number in the tens place value:
6×4=24

Write 4 in the tens place.

Because the result is greater than 9, carry the 2 to the hundreds place.

Multiply the ones digit (6) of the multiplicator by the number in the hundreds place value and add the carried number (2):
6×6+2=38

Write 8 in the hundreds place.

Because the result is greater than 9, carry the 3 to the thousands place.

The solution is: 3,846