On a certain day, the minimum temperature in Shanghai is 1°C, the minimum temperature in Nanchang is 2°C, and the minimum temperature in Changsha is 2°C. The minimum temperature in Hangzhou is just in proportion to the temperature in the above three places, and it is higher than the minimum temperature in Nanchang. Hangzhou What is the lowest temperature in ?
某日，上海的最低气温是1℃，南昌的最低气温是2℃，长沙的最低气温是2℃，杭州的最低气温和以上3地气温刚好能组成比例，而且比南昌的最低气温高，杭州的最低气温是多少？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>