Mom's income in September is 4,500 yuan, of which (3/5) is used for living expenses, and the rest is used as deposits. How much yuan does mother only save in September?
妈妈9月份的收入是4500元，当中的(3/5)用于生活支出，其余用作存款，妈妈九月只存多少元？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4_500 * (2/5)</gadget>
<output>1_800</output>

<result>1_800</result>