Mom went shopping in the supermarket and bought 20 steamed buns and 15 dumplings. It is known that a steamed bun costs 80 cents and a dumpling costs 90 cents. How much did my mother spend on shopping?
妈妈去超市买东西，买了20个馒头和15个饺子，已知一个馒头8角钱，一个饺子9角钱，问妈妈买东西一共花了多少钱？
<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<gadget id="calculator">15 * 9</gadget>
<output>135</output>

<gadget id="calculator">160 + 135</gadget>
<output>295</output>

<gadget id="calculator">295 / 10</gadget>
<output>59/2 = around 29.5</output>

<result>59/2 = around 29.5</result>