4*63 +4*79 + 142*6 = 4(63+79) + 142*6= 4* 142 + 142*6 = 142(4+6) = 142*10 = 1420
7*125 + 3*62 + 63*3 = 7*125 + 3(62+63) = 7*125 + 3*125 = 125(7+3) = 125*10 = 1250
17*27 + 23*17 + 50*19 = 17(27+23) + 50*19 = 17*50 + 50*19 = 50(17+19) = 50*36 = 1800
38*46 + 62*46 + 100*54 = 46(38+62) + 100*54 = 46*100 + 100*54 = 100(46+54) = 100*100 = 10000