After the price of a kind of clothing is reduced by 30%, each piece is only sold for 70 yuan. How much does each piece of this kind of clothing originally sell for?
一种服装降价30%后，每件只卖70元，这种服装原来每件卖多少元．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">70 / (7/10)</gadget>
<output>100</output>

<result>100</result>