The cold air hit, and the mother bought a pair of gloves and a scarf for each of the twin daughters, spending a total of 51.4 yuan. Given that the price of the scarf is 15.8 yuan, how much is each pair of gloves?
冷空气来袭，妈妈给双胞胎女儿各买一副手套和一条围巾，共花51.4元．已知围巾的价格是15.8元，那么手套每副多少元？
<gadget id="calculator">15.8 * 2</gadget>
<output>31.6</output>

<gadget id="calculator">51.4 - 31.6</gadget>
<output>19.8</output>

<gadget id="calculator">19.8 / 2</gadget>
<output>9.9</output>

<result>9.9</result>