The cement factory produces a batch of cement. The original plan is to produce 26.5 tons of cement per day, which will be completed in 30 days. The actual daily production of cement is 39.75 tons. How many days did it actually take?
水泥厂生产一批水泥，原计划每天生产水泥26.5吨，30天完成．实际每天生产水泥39.75吨，实际用了多少天？
<gadget id="calculator">30 / 39.75</gadget>
<output>0.754717</output>

<gadget id="calculator">26.5 * 0.754717</gadget>
<output>20</output>

<result>20</result>