# Length of a string

What are the smallest string length we can cut into 18 equal parts and even 27 equal parts (in decimeters)?

## Correct answer:

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Do you want to calculate the greatest common divisor of two or more numbers?

Do you want to convert length units?

### You need to know the following knowledge to solve this word math problem:

**algebra**- prime numbers
- divisibility
- least common multiple (LCM)
- greatest common divisor (GCD)
**numbers**- natural numbers

### Units of physical quantities:

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