It is known that the product of two factors is 0.81, one of which is 1.35, and what is the other factor.
已知两个因数的积是0.81，其中的一个因数是1.35，另一个因数是多少．
<gadget id="calculator">0.81 / 1.35</gadget>
<output>0.6</output>

<result>0.6</result>