student went to a factory for a work-study program. According to the contract, the factory would give him a set of work clothes and 70 yuan for playing after working for 30 days. However, due to other arrangements made by the school, the contract was terminated after he worked for 20 days, and the factory only gave him a set of work clothes. Work clothes and 20 yuan. May I ask: How much is this set of work clothes worth?
某学生到工厂勤工俭学，按合同规定，干满30天，工厂将给他一套工作服和70玩钱，但由于学校另有安排，他工作了20天后便中止了合同，工厂只给他一套工作服和20元钱．请问：这套工作服值多少元？
<gadget id="calculator">70 / 30</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">(7/3) * 20</gadget>
<output>140/3 = around 46.666667</output>

<gadget id="calculator">(140/3) - 20</gadget>
<output>80/3 = around 26.666667</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) * 20</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(80/3) / (1/3)</gadget>
<output>80</output>

<result>80</result>