A grocery store makes a gift box out of toffee and chocolate. The mass ratio of toffee and chocolate in each box is 5:3. If there are 60kg of toffee and 60kg of chocolate each, how many kilograms of chocolate will be left when the toffee is used up?
食品店用奶糖和巧克力配制一种礼品盒．每盒中奶糖和巧克力的质量比是5：3，如果有奶糖和巧克力各60kg，奶糖用完时，巧克力还剩多少千克？
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">60 / (5/3)</gadget>
<output>36</output>

<gadget id="calculator">60 - 36</gadget>
<output>24</output>

<result>24</result>