(7/8) What is the product of the smallest true fraction whose denominator is 1 digit?
(7/8)乘分母是1位数的最小真分数，积是多少．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(7/8) * (1/9)</gadget>
<output>7/72 = around 0.097222</output>

<result>7/72 = around 0.097222</result>