а * 10 = 4020
а = 4020 :10
а = 402
b + 5007 = 305 *60
b + 5007 = 18300
b = 18300 - 5007
b = 13293
b
b +5007 =305 *60
b+5007 =18 300
b =18 300 -5 007
b =13 293
a *10=2384+1636
a*10=4 020
a=4 020 / 10
a=402
а * 10 = 4020
а = 4020 :10
а = 402
b + 5007 = 305 *60
b + 5007 = 18300
b = 18300 - 5007
b = 13293
b
b +5007 =305 *60
b+5007 =18 300
b =18 300 -5 007
b =13 293
a *10=2384+1636
a*10=4 020
a=4 020 / 10
a=402