Tutu, a person with a heart for mathematics, discovered from the registration form when he visited the museum that 320 people came in the morning, 85 people left at noon, and 128 people came in the afternoon. How many people are there now?
数学的有心人图图在博物馆参观时从登记表上发现，上午来了320人，中午离去85人，下午又来了128人，现在有多少．
<gadget id="calculator">320 - 85</gadget>
<output>235</output>

<gadget id="calculator">235 + 128</gadget>
<output>363</output>

<result>363</result>