Master Li plans to finish shipping a batch of goods within 3 days. On the first day, 42 tons were shipped, accounting for (2/5) of this batch of goods. The mass ratio of the second day to the third day was 4:3. How many tons are you shipping?
李师傅计划3天内运完一批货物，第一天运了42吨，占这批货物的(2/5)，第二天与第三天的运的质量比是4：3，第二天运货多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">42 / (2/5)</gadget>
<output>105</output>

<gadget id="calculator">105 - 42</gadget>
<output>63</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">63 * (4/7)</gadget>
<output>36</output>

<result>36</result>