Xiao Liang and Xiao Yang went to the store to buy trousers together. Xiao Liang brought 164 yuan and Xiao Yang brought 128 yuan. The money they brought together can buy 2 pairs of the same trousers. How much should Xiao Yang pay Xiao Liang?
小梁和小杨一起到商店买裤子，小梁带了164元，小杨带了128元，她们所带的钱合在一起正好可以买2条相同的裤子．小杨应该还给小梁多少钱？
<gadget id="calculator">164 + 128</gadget>
<output>292</output>

<gadget id="calculator">292 / 2</gadget>
<output>146</output>

<gadget id="calculator">146 - 128</gadget>
<output>18</output>

<result>18</result>