1 kgf= _____ (nearly)

Hint: The kgf stands for the unit kilogram-force. It is related to the gravitational force experienced by an object of 1-kilogram mass.
Formula used: In this solution, we will use the following formula:
Weight of an object: $W = mg$ where $m$ is the mass and $g$ is the gravitational acceleration

Complete step by step answer:
The kilogram-force is a metric unit of the measurement of force (kgf). The kilogram-force is equal to a mass of one kilogram multiplied by the standard acceleration due to gravity on Earth’s surface, which is defined as roughly$9.8m/{s^2}$.
Then one kilogram-force can be calculated form
$F = mg$
Which gives us
$1\,kgf = 1 \times 9.8\,m/{s^2}$
$ \Rightarrow 1\,kgf = 9.8\,{\text{N}}$
This is nearly equal to $10\,N$. So, we can say that
$1\,kgf = 10\,N$

Additional information: The kilogram-force is a non-standard unit of force. It is a non-standard unit and is classified as a unit that is not accepted by the SI units system. They had been used in low-precision measurements of force before the General Conference on Weights and Measures deicide that the gravitational acceleration was roughly $9.8m/{s^2}$. Before this decision, it was widely used in much of the world and it is still in use for some purposes. It was used to measure the thrust of a rocket in Germany and Russia in the 1940s.

Note: In such questions, we often have to convert the units to all the different units mentioned in the formula of the unit. For that purpose, we should be familiar with the inter-conversions of basic mechanical quantities of motion such as force, acceleration, distance, etc.