What can be calculated simply is 1.25 * 0.25 * 60 3.6 * 4.7 + 6.3 * 3 and 3 / 5-3.6
1.25×0.25×60
=5/4×1/4×60=75/4
Original formula = 3.6 × 4.7 + 6.3 × 3.6-3.6
=3.6(4.7+6.3-1)
=36
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