There are 60 tons of cement on the construction site, 1/4 of the total amount is used on the first day, and 15% of the total amount is used on the second day. How many tons are shared between the two times?
建筑工地有水泥60吨，第一天用去总数的(1/4)，第二次用去总数的15%，两次共用去多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(1/4) + (3/20)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 * (2/5)</gadget>
<output>24</output>

<result>24</result>