40 x 10 = 400
The product of 4 tens and 2 tens can be calculated by multiplying the numerical values of the tens, which are 4 and 2. 4 tens is equal to 40, and 2 tens is equal to 20. Multiplying 40 by 20 gives you a product of 800. So, the product of 4 tens and 2 tens is 800.
40 tens
40
400.
40. 4 is in tens place