Among the 200 integers from 1 to 200, how many numbers do not contain the number 7?
在1～200这200个整数中，不含数字7的数有多少个．
<gadget id="calculator">10 + 9</gadget>
<output>19</output>

<gadget id="calculator">19 * 2</gadget>
<output>38</output>

<gadget id="calculator">200 - 38</gadget>
<output>162</output>

<result>162</result>