To process a batch of parts, a machine processes 720 pieces per hour, (2/3) of the total number of parts processed in (3/4) hours. How many parts are there in this batch?
要加工一批零件，一台机器每小时加工720个，(3/4)小时加工了零件总数的(2/3)．这批零件共有多少个？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/4) / (2/3)</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">720 * (9/8)</gadget>
<output>810</output>

<result>810</result>