freight company transported a pile of coal and planned to finish the shipment in 3 days. It shipped 4.5 tons on the first day and 40% of the total on the second day. The ratio of the tons shipped on the third day to the tonnage shipped on the first day was 7:5 , How much did you ship the next day?
某货运公司运一堆煤，计划3天运完，第一天运了4.5吨，第二天运了全部的40%，第三天运的与第一天运的吨数比为7：5，第二天运了多少？
<gadget id="calculator">7 / 5</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">4.5 * (7/5)</gadget>
<output>6.3</output>

<gadget id="calculator">6.3 + 4.5</gadget>
<output>10.8</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">10.8 / (3/5)</gadget>
<output>18</output>

<gadget id="calculator">18 * (2/5)</gadget>
<output>36/5 = around 7.2</output>

<result>36/5 = around 7.2</result>