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1,9A = 57 |*10
19A = 570 /:19
A = 30
190% B = 95
1,9B = 95 |*10
19B = 950 /:19
B = 50
1,9a=57
a=57:1,9
a=570:19
a=30
190%*b=95
1,9b=95
b=95:1,9
b=950:19
b=50