3a+b/2

2. The product of a is a number of 2.

2/a

3. the square difference between m and n.

m？ -n？

A workshop originally planned to produce m parts per month, but the actual output increased by 25%. How many parts does the workshop actually produce every month?

m( 1+25%)

Note:/is a fractional line, for example, b/2 means 2/2.