The quotient of two numbers is 0.81, the divisor is reduced to the original (1/10), and the dividend remains unchanged. What is the quotient?
两个数的商是0.81，除数缩小到原来的(1/10)，被除数不变，商是多少．
<gadget id="calculator">0.81 * 10</gadget>
<output>8.1</output>

<result>8.1</result>