24 times 13 = 2.
ClearCheck
4 × 3 is equal to 12.
12 is equivalent to 1 group of ten and 2 ones.
The red 2 that was written represents the 2 ones that came from the product of 4 and 3.
The red 1 written above the tens place represents the 1 group of ten that needs to be carried over to the next column when multiplying.