A football is sewn from 12 pieces of black leather (pentagon) and 20 pieces of white leather (hexagon). There are currently 360 pieces of black leather, at least how many pieces of white leather are needed to use up the black leather?
一个足球由12块黑皮(五边形)和20块白皮(六边形)缝制而成．现有360块黑皮，至少要配多少块白皮才能把黑皮用完？
<gadget id="calculator">12 / 20</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">360 / (3/5)</gadget>
<output>600</output>

<result>600</result>