Kobayashi's family used to use an average of 5 degrees of electricity per day. After switching to energy-saving lamps, the daily electricity consumption is the original (3/5). After switching to energy-saving lamps, how much electricity did Kobayashi's family consume in June?
小林家原来平均每天用电5度，改用节能灯后，每天的用电量是原来的(3/5)．改用节能灯后，小林家六月份用电多少度？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 * (3/5) * 30</gadget>
<output>90</output>

<result>90</result>