Round the clip-path corners in css when I am using it as dropdown menu

hi I want to round my corner clip path shape .
I tried to draw it manually but It does not look good
is there any way to do it precisely?

.drop-down-menu {
  position: absolute;
  top: 86%;
  left: 0;
  background-color: #d6d3d1;
  width: 100%;
  perspective: 1000px;
  z-index: -1;
  clip-path: polygon(32% 0, 44% 7%, 100% 7%, 100% 100%, 0 100%, 0 7%, 20% 7%);
}