The sum of two digits is 10.

Rule: Multiply the single digits to get the last two digits. If the product is a single digit, add 0 in front of it, and the result obtained by multiplying the remaining digits (itself+1) is in front of the result obtained by multiplying the single digits.

2、3*4= 12

5*5=25

35*35= 1225

3、49*(49+ 1)=2450

6*4=24

496*494=245024