In the arithmetic sequence 6, 13, 20, 27, ..., the number (Shǔ) from left to right is 1994.
在等差数列6，13，20，27，…中，从左向右数(Shǔ)第多少个数是1994．
<gadget id="calculator">1_994 - 6</gadget>
<output>1_988</output>

<gadget id="calculator">1_988 / 7</gadget>
<output>284</output>

<gadget id="calculator">284 + 1</gadget>
<output>285</output>

<result>285</result>