In order to encourage residents to economize on the use of gas, a certain city adopts the method of billing in sections every year. If the annual gas consumption of each household is less than 360 cubic meters, 2.70 yuan per cubic meter; if the annual gas consumption exceeds 360 cubic meters, 2.85 yuan per cubic meter. Grandma Zhang’s family used 405 cubic meters of gas last year. How much should I pay?
某市为了鼓励居民节约使用燃气，采用按年分段计费的方法收费．每户年用气量在360立方米以内的，每立方米2.70元；年用气量超过360立方米的部分，每立方米2.85元．张奶奶家去年用气405立方米，应缴费多少元？
<gadget id="calculator">360 * 2.7</gadget>
<output>972</output>

<gadget id="calculator">405 - 360</gadget>
<output>45</output>

<gadget id="calculator">45 * 2.85</gadget>
<output>128.25</output>

<gadget id="calculator">972 + 128.25</gadget>
<output>1_100.25</output>

<result>1_100.25</result>