In natural numbers, the largest two-digit number, minus the smallest one-digit number, and then multiplied by (1/7), is the number.
自然数中，最大的两位数，减去最小的一位数，再乘以(1/7)，得多少．
<gadget id="calculator">99 - 1</gadget>
<output>98</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">98 * (1/7)</gadget>
<output>14</output>

<result>14</result>