How many kilograms of raisins can 360 kg be sun-dried to reduce the original weight of grapes?
葡萄晒成葡萄干要减轻原质量的80%，360千克可以晒成多少千克葡萄干．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">360 * (1/5)</gadget>
<output>72</output>

<result>72</result>