How many five-digit numbers are there in which the sum of the digits is 5?
在五位数中，各位数字之和是5的五位数有多少个．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">1 + 8 + 8 + 18 + 18 + 16 + 1</gadget>
<output>70</output>

<result>70</result>