family consists of husband, wife, daughter and son, and their combined age this year is 73 years old. The husband is 3 years older than the wife, and the daughter is 2 years older than the son. The sum of the ages of the family members 4 years ago was 58 years old. Question: How old is the husband than the son?
一个家庭由丈夫、妻了、女儿和儿子组成，今年他们的年龄和是73岁．丈夫比妻子大3岁，女儿比儿子大2岁．4年前这个家庭成员的年龄和是58岁．问：丈夫比儿子多几岁？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">73 - 3 - 5</gadget>
<output>65</output>

<gadget id="calculator">65 + 3</gadget>
<output>68</output>

<gadget id="calculator">68 / 2</gadget>
<output>34</output>

<gadget id="calculator">34 - 3</gadget>
<output>31</output>

<result>31</result>