A construction site needs 240 tons of cement, 30 vehicles are used to transport 150 tons at a time, and the remaining 6 tons are transported each time. How many times do you need to transport it?
某工地需水泥240吨，用30辆汽车一次运走了150吨，剩下的每次运6吨，还需要运多少次才能运完？
<gadget id="calculator">240 - 150</gadget>
<output>90</output>

<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<result>15</result>