Xiao Li typed a 2700-word manuscript. She called (7/9) for 5 hours. How many words does she type per hour on average?
小李打一份2700字的稿件．她5小时打了(7/9)．她平均每小时打多少个字？
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(7/9) / 5</gadget>
<output>7/45 = around 0.155556</output>

<gadget id="calculator">2_700 * (7/45)</gadget>
<output>420</output>

<result>420</result>