Processing a batch of parts, Xiao Wang processes 36 per hour, and the ratio of Xiao Zhang's processing per hour is 4:5, how many parts does Xiao Zhang process per hour?
加工一批零件，小王每小时加工36个，与小张每小时加工个数的比是4：5，小张每小时加工多少个零件？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">36 * (5/4)</gadget>
<output>45</output>

<result>45</result>