There are some building blocks with more than 50 blocks and less than 70 blocks. If there are 7 blocks in a pile, there is one more block, and in every 9 blocks, there is still 1 block more. How many blocks are there?
有一些积木的块数比50多，比70少，每7个一堆，多了一块，每9个一堆，还是多1块，这些积木有多少块．
<gadget id="calculator">7 * 9</gadget>
<output>63</output>

<gadget id="calculator">63 + 1</gadget>
<output>64</output>

<result>64</result>