A batch of 90 tons of cement is transported away (1/5) for the first time, and (2/5) for the second time. How many tons are transported in total?
一批水泥90吨，第一次运走(1/5)，第二次运走它的(2/5)，两次共运走多少吨？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

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

<gadget id="calculator">90 * (3/5)</gadget>
<output>54</output>

<result>54</result>