Fill in the appropriate number in the horizontal line. 500/how much=7...10.
在横线里填上适当的数．500/多少=7…10．
<gadget id="calculator">500 - 10</gadget>
<output>490</output>

<gadget id="calculator">490 / 7</gadget>
<output>70</output>

<result>70</result>