Sakura wrapped the bouquet with a 10-meter-long ribbon. 35% of the ribbons are used for packaging carnations, and 15% for packaging lilies. How many meters have been used?
小樱用一条10米长的彩带包装花束．包装康乃馨用去彩带的35%，包装百合花剪去15%．已经用去了多少米？
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(7/20) + (3/20)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 * (1/2)</gadget>
<output>5</output>

<result>5</result>