Uncle Zhang went abroad on a business trip on April 1, and returned to Guangzhou on November 16. How much time did Uncle Zhang spend on this business trip?
张叔叔4月1日出差去国外，11月16日回到广州，张叔叔这次出差一共花了多少时间？
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">31 * 4</gadget>
<output>124</output>

<gadget id="calculator">90 + 124 + 16</gadget>
<output>230</output>

<result>230</result>