To prepare a kind of gift candy, the mass ratio of toffee to chocolate is 5:3. There are 100 kilograms of toffee and chocolate each, how many kilograms of chocolate will be left when all the toffee is used up
配制一种礼品糖，所需奶糖和巧克力的质量比为5：3．现有奶糖和巧克力各有100千克，那么当奶糖全部用完时，巧克力会剩余多少千克
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">100 * (3/5)</gadget>
<output>60</output>

<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<result>40</result>