The construction site needs 25 tons of cement, and 5 tons have been transported. The remaining cement is transported by a truck with a load of 4 tons. How many such trucks are needed to transport it all at once?
工地上需要25吨水泥，已经运来了5吨，剩下的水泥用载重4吨的卡车运，需要几辆这样的卡车才能一次运完？
<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<result>5</result>