There are several pieces of goods in place A to be transported to place B. On the first day, 3/8 of the total number of pieces are shipped, and on the second day, 25% of the total number of pieces are shipped, leaving 270 pieces. How many pieces have been shipped?
甲地有若干件货物要运到乙地，第一天运走总件数的(3/8)，第二天运走总件数的25%，还剩下270件，问已运走多少件？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/8) - (1/4)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">270 / (3/8)</gadget>
<output>720</output>

<gadget id="calculator">720 - 270</gadget>
<output>450</output>

<result>450</result>