The money-to-money ratio of Zhang's family and Li's family this month is 8:5, and the money-to-money ratio of expenditure this month is 8:3. At the end of the month, Zhang's family saved 240 yuan, and Li's family saved 550 yuan. What is the income of the Zhang family this month?
张家和李家本月收入的钱数比是8：5，本月开支的钱数比是8：3，月底张家节约240元，李家节约550元．则本月张家收入是多少元．
<gadget id="calculator">8 / 3</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">(8/3) * 550</gadget>
<output>4_400/3 = around 1_466.666667</output>

<gadget id="calculator">(4_400/3) - 240</gadget>
<output>3_680/3 = around 1_226.666667</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(8/3) * (5/8)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) - 1</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3_680/3) / (2/3)</gadget>
<output>1_840</output>

<result>1_840</result>