When two numbers are multiplied and one of the factors remains unchanged, what should be the other factor in order to reduce the product to the original (1/3).
两个数相乘，其中一个因数不变，要使积缩小到原来的(1/3)，另一个因数应该多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>