It costs 890 yuan to buy 4 footballs and 5 basketballs, and 203 yuan to buy 1 football and 1 basketball. Teacher Li bought 15 basketballs, how much did he pay in total?
买4个足球和5个篮球要890元，买1个足球和1个篮球要203元．李老师买了15个篮球，一共付了多少钱？
<gadget id="calculator">203 * 4</gadget>
<output>812</output>

<gadget id="calculator">890 - 812</gadget>
<output>78</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">78 / 1</gadget>
<output>78</output>

<gadget id="calculator">78 * 15</gadget>
<output>1_170</output>

<result>1_170</result>