The careless Xiaodong miswrote the factor 4.2 as 42 when calculating a multiplication problem. The resulting product is 151.2. What is the correct product?
粗心的小东在计算一道乘法题时把因数4.2错写成42，结果积是151.2，正确的积应是多少．
<gadget id="calculator">42 / 4.2</gadget>
<output>10</output>

<gadget id="calculator">151.2 / 10</gadget>
<output>15.12</output>

<result>15.12</result>