13×20 =3r7U;f-X(e1Y+l/e4S2f*W2b;w)d/}3K([
50×21=2|:R*R/u9]5n5E5w2m6X(A5x;A4S2f*W2b;w)d/}3K([
50×30=,n5b0L1H4S2f*W2b;w)d/}3K([
140÷2=3o2i-j(F'V2j7S0r,q4S2f*W2b;w)d/}3K([