40 tons of sand were transported to the construction site, 15 tons less gravel than sand, and three times as many tons of cement as gravel. How many tons of cement were transported?
工地上运来砂子40吨，运来的石子比砂子少15吨，运来水泥的吨数是石子的3倍，运来水泥多少吨？
<gadget id="calculator">40 - 15</gadget>
<output>25</output>

<gadget id="calculator">25 * 3</gadget>
<output>75</output>

<result>75</result>