0.5*9.8=4.9, expand the multiplier 0.5 to 100 times of the original, and shrink 9.8 to the original (1/10), what is the product?
0.5*9.8=4.9，把乘数0.5扩大到原来的100倍，9.8缩小到原来的(1/10)，积是多少．
<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">0.5 * 9.8 * 10</gadget>
<output>49</output>

<result>49</result>