In September, a food factory produced 7/2 tons less milk biscuits than fruit juice biscuits, and produced 1/5 more tons of juice biscuits than milk biscuits. How many tons did milk biscuits produce?
一食品厂九月份生产的牛奶饼干比果汁饼干少2分之7吨，果汁饼干生产的吨数比牛奶饼干多5分之1，牛奶饼干生产了多少吨？
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(7/2) / (1/5)</gadget>
<output>35/2 = around 17.5</output>

<result>35/2 = around 17.5</result>