If you buy 2 towels and 3 soaps, you need to pay 18 yuan; if you buy 3 towels and 2 soaps, you need to pay 19 yuan (towels and soaps are of the same type). So how much does it cost to buy 1 towel and 1 bar of soap?
买2条毛巾，3块肥皂，要付18元；买3条毛巾，2块肥皂，要付19元(毛巾，肥皂，都分别是同一品种的)．那么买1条毛巾，1块肥皂要付多少元．
<gadget id="calculator">18 + 19</gadget>
<output>37</output>

<gadget id="calculator">37 / 5</gadget>
<output>37/5 = around 7.4</output>

<result>37/5 = around 7.4</result>