how to figure this maths problem out.

what is the answer for this maths problem

A.)3x134=402                                    

3x4=12                                                

3x30=90                                              

3x100=300                                          

300+90+12=402

B.)4x233=932

4x3=12

4x30=120

4x200=800

800+120+12=932

C.)6x518=3108

6x8=48

6x10=60

6x500=3000

3000+60+48=3108

D.)4x204=816

4x4=16

4x00=0

4x200=800

800+0+16=816

E.)6x142=852

6x2=12

6x40=240

6x100=600

12+240+600=852

F.)9x223=2007

9x3=27

9x20=18

9x200=180

180+18+27=2007

G.)3 x 257=771

3x7=21

3x50=150

3x200=600

600+150+21=771

H.)7x124=700

7x4=28

7x20=140

7x100=700

I.)4x258=1032

4x8=32

4x50=200

4x200=800

800+200+32=1032