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3.6×9.8+36×0.02=3.6×9.8+3.6×0.2=3.6×(9.8+0.2)=3.6×10=36
3.6*9.8+36*0.02=3.6*9.8+3.6*0.2=3.6*(9.8+0.2)=3.6*10=36