How to Find Corresponding Relay Chain Block from Asset Hub Block

[Imod7]

If I have an Asset Hub block number, what is the method to find its associated Relay Chain block number?

[Imod7]

If you have a Asset Hub block number and you would like to retrieve the Relay Chain block number, this information is included in the response of

/blocks/_AH_BLOCK_HEIGHT_

under extrinsics > args > data > validationData > relayParentNumber field as shown below:

"extrinsics": [
       {
           "method": {
               "pallet": "parachainSystem",
               "method": "setValidationData"
           },
           "signature": null,
           "nonce": null,
           "args": {
               "data": {
                   "validationData": {
                       "parentHead": "...",
                >>>    "relayParentNumber": "27205581",
                       "relayParentStorageRoot": "0x07813c2c7c6dcb2952ddd52567a6a19f67a27cf2d47614118447d1fd130a41c2",
                       "maxPovSize": "10485760"
                   },