The product of x and 0.25 plus 70 equals 100, then x = how much.
x与0.25的积加上70等于100，则x=多少．
<gadget id="calculator">100 - 70</gadget>
<output>30</output>

<gadget id="calculator">30 / 0.25</gadget>
<output>120</output>

<result>120</result>