There is a batch of watermelons in the fruit shop, and 2 tons are sold in the morning, which happens to be the batch of watermelons (4/7). Sell 40% of this batch of watermelons in the afternoon, how many tons are sold in the afternoon?
水果店有一批西瓜，上午卖掉2吨，卖掉的正好是这批西瓜的(4/7)．下午卖掉这批西瓜的40%，下午卖掉了多少吨？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">2 / (4/7)</gadget>
<output>7/2 = around 3.5</output>

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

<gadget id="calculator">(7/2) * (2/5)</gadget>
<output>7/5 = around 1.4</output>

<result>7/5 = around 1.4</result>