After the two factors are enlarged by 10 times, the product is 2130. What is the product of these two factors?
两个因数各扩大10倍后，积是2130，原来这两个因数的积是多少．
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">2_130 / 100</gadget>
<output>213/10 = around 21.3</output>

<result>213/10 = around 21.3</result>