A block of mass = 10. Due to the weight of the block, the block remains at rest when the spring is stretched a distance = 8

A block of mass = 10.0 is attached to the end of an ideal spring. Due to the weight of the block, the block remains at rest when the spring is stretched a distance = 8.00 from its equilibrium length. The spring has an unknown spring constant . Take the acceleration due to gravity to be = 9.81 . What is the spring constant ?Express your answer in newtons per meter.