Multiply Mr. Gao's age by 2, add 4, and divide by 6, which is exactly equal to Xiao Ming's age of 13. How old is Mr. Gao this year?
用高老师的年龄乘2，加上4，除以6，正好等于小明的年龄13岁，高老师今年多少岁．
<gadget id="calculator">13 * 6</gadget>
<output>78</output>

<gadget id="calculator">78 - 4</gadget>
<output>74</output>

<gadget id="calculator">74 / 2</gadget>
<output>37</output>

<result>37</result>