Uncle Zhang was lucky to be the Olympic torchbearer. During the relay, he traveled (3/2) kilometers in (1/3) hour. How many kilometers did Uncle Zhang travel per hour?
张叔叔有幸成为了奥运火炬手，在接力过程中，他(1/3)小时行了(3/2)千米，张叔叔每小时行多少千米？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/2) / (1/3)</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>