The kindergarten buys 5 towels and 5 pieces of soap. The towels cost 21.5 yuan and the soap costs 13.2 yuan. How much is a towel more expensive than a piece of soap?
幼儿园买5条毛巾和5块肥皂，毛巾用21.5元，肥皂用13.2元，一条毛巾比一块肥皂贵多少元？
<gadget id="calculator">21.5 / 5</gadget>
<output>4.3</output>

<gadget id="calculator">13.2 / 5</gadget>
<output>2.64</output>

<gadget id="calculator">4.3 - 2.64</gadget>
<output>1.66</output>

<result>1.66</result>