Dad bought an MP3 player in the electronic city and spent half of the money he had on him, and bought a microphone for 220 yuan. At this time, my father just bought a pair of mini speakers with the remaining 180 yuan. How much money did Dad bring with him?
爸爸在电子城买了一个MP3用去了身上所带钱的一半，又买了一个话筒用去220元，这时爸爸用剩下的180元正好买了一副迷你小音响．爸爸原来身上带了多少钱？
<gadget id="calculator">220 + 180</gadget>
<output>400</output>

<gadget id="calculator">400 * 2</gadget>
<output>800</output>

<result>800</result>