In the 15th Asian Games, China won 165 gold medals, three times that of South Korea, and Japan had 5 less than South Korea. How many gold medals has Japan won?
在第15届亚运会上，中国获得金牌165枚，是韩国的3倍，日本比韩国少5枚．日本获金牌多少枚？
<gadget id="calculator">165 / 3</gadget>
<output>55</output>

<gadget id="calculator">55 - 5</gadget>
<output>50</output>

<result>50</result>