Question

147*85+53*60+147*15+53*40=

Answer 1

147(85+15)+53(40+60)= 14700+5300=20000

Answer 2

147*85+53*60+147*15+53*40=20000         
  1)147         2)53              3)147          4)53           5)12495+3180+2205+2120=20000

     *85            *60                *15            *40

   _______      ______           _____        _____  

         735        3180              735           2120            

    +1176                          + 147

   ________                        _____

      12495                          2205