A total of 60 kilograms of mixed sugar consisting of milk sugar, fruit sugar, fudge and halva, of which the sum of the mass of milk sugar and fruit sugar accounts for 2/3 of the total mass, and the sum of the mass of milk sugar and soft candy Accounting for 75% of the total mass, the sum of the mass of toffee and halva accounts for 60% of the total mass, how many kilograms of toffee is there?
由奶糖、水果糖、软糖和酥糖四种糖组成的混合糖共60千克，其中奶糖和水果糖质量之和占总质量的(2/3)，奶糖和软糖质量之和占总质量的75%，奶糖和酥糖质量之和占总质量的60%，求奶糖有多少千克？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 * (2/3)</gadget>
<output>40</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">60 * (3/4)</gadget>
<output>45</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

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

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

<gadget id="calculator">40 + 45 + (-24)</gadget>
<output>61</output>

<gadget id="calculator">61 / 2</gadget>
<output>61/2 = around 30.5</output>

<result>61/2 = around 30.5</result>