The quotient of an expression is 3.9, if the dividend is reduced to its (1/10), and the divisor is enlarged by 10 times, what is the quotient?
一个算式的商是3.9，如果将被除数缩小到它的(1/10)，除数扩大10倍，商是多少．
<gadget id="calculator">10 / 1</gadget>
<output>10</output>

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

<gadget id="calculator">3.9 / 100</gadget>
<output>0.039</output>

<result>0.039</result>