A loom weaves 4.5 kilometers in 3 hours. According to this calculation, if we weave another 5 hours, how many kilometers can we weave in total? (Solve with ratio)
一台织布机3小时织布4.5千米，照这样计算，如果再织5小时一共可织布多少千米？(用比例解)
<gadget id="calculator">4.5 / 3</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 * 3</gadget>
<output>4.5</output>

<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">4.5 + 3</gadget>
<output>7.5</output>

<result>7.5</result>