The number 30 less than 5 times a number is 470, what is this number?
比一个数的5倍少30的数是470，这个数是多少？
<gadget id="calculator">470 + 30</gadget>
<output>500</output>

<gadget id="calculator">500 / 5</gadget>
<output>100</output>

<result>100</result>