The human adult spine has 33 vertebrae, the bones that support the rest of the body. The lumbar vertebrae, in the lower back, bear the weight of the upper body and are very flexible. If you have lower back problems, it’s often your lumbar vertebrae that are struggling under the weight they have to bear.
Multiplication is a lumbar vertebra in the spinal column of mathematics. Multiplication supports the weight of, amongst other things:
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