What is the reciprocal of the sum of 1 and the largest one-digit composite number.
1与最大的一位合数的和是多少的倒数．
<gadget id="calculator">1 + 9</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>