A pile of yellow sand weighs 7,800 kilograms, and 300 kilograms have been used. How many times the amount left is used?
一堆黄沙重7800千克，已经用去300千克，剩下的是用去的多少倍？
<gadget id="calculator">7_800 - 300</gadget>
<output>7_500</output>

<gadget id="calculator">7_500 / 300</gadget>
<output>25</output>

<result>25</result>