Today, my mother gave me a question 3ⅹ3=? I snickered to myself, thinking that my mother had studied for so many years before! I can't believe I asked such a childish question. So I answered absently: "3ⅹ3=9." Mom asked me 33ⅹ33=? I did some calculations on the draft paper with a pen, and I got 1089. I will answer immediately.

Then my mother asked 333ⅹ333=? I got 1 10889 after a stroke of calculation, so I answered my mother's question again. Mom seemed dissatisfied and asked 3333ⅹ3333=? I suddenly froze. This is because my mother stopped asking, but asked me if I found any patterns. I read every answer carefully and finally understood. It turns out that each number is 9, ten numbers are 8, and the highest number is 1. Each occurrence of 1 3, 1 and 8 in the two factors increases by 1 respectively. I immediately got 1 1 108889 from here. We also know that we can use this law to solve many problems. I immediately told my mother about this rule and the bright smile on her face.

At this time, I deeply realized that "nothing is difficult in the world, nothing is impossible to a willing mind". This realizes that as long as we observe carefully, nothing will baffle us.

Comments: (There are endless mysteries in the ocean of mathematics. As long as we observe carefully and think carefully, there will be new discoveries. The little author starts from "3ⅹ3=?" Starting with observation and thinking, we found that "3333ⅹ3333=?" Finally, I realized a profound truth, and the whole article was coherent.