\(a,4,86\times0,25\times40\)
\(=4,86\times10\)
\(=48,6\)
\(b,0,125\times6,94\times80\)
\(=\left(0,125\times80\right)\times6,94\)
\(=10\times6,94\)
\(=69,4\)
\(c,96,28\times3,527+3,527\times3,72\)
\(=3,527\times\left(96,28+3,72\right)\)
\(=3,527\times100\)
\(=352,7\)